Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d06113cc7453a4…

MALICIOUS

PDF

125.1 KB Created: 2021-06-30 06:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f0ed64b71d34c935a320252cc0ebdb62 SHA-1: abff4ab0d859c46c07b8c67952bdc94763a79ada SHA-256: e2d06113cc7453a4758ff7d0e4617e73bab7d9c1e18b78db41fbd563afe4dc31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links, many hosted on compromised WordPress sites and disposable domains, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. While no scripts were extracted, the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/itij74odvvu9g77i5mv2o6tj02/77774214527.pdf In PDF document text
    • http://e-hane.com/files/sogizuf.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/56497571922.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607375c388fcf---livuwixibedave.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609658b574edb---72707447731.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca3a66d7f7---depisibutulabasunudobuki.pdfIn PDF document text
    • http://ivepe-elearning.gr/assets/UserFiles/mainHome/file/sewoxoguteno.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/15942779d602bf440ee3bc2ab7bc95c2.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///damuwafelilokubi.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/wemonorezoboli.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/0ebb4f615f541f3c7dedff89327fda7d/19227864119.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb4494fd4f---9308351281.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/91160624676.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-6-23/20210623073421750564.pdfIn PDF document text
    • http://bkht.vn/userfiles/file/zudelelugebalitipo.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16085f0cd18796---tafakim.pdfIn PDF document text
    • http://jatyn.cn/upfiles/202105/file/1622397016.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bca11722502---binunug.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cabda2e4c---58901299814.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0e61752e9---6553743529.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/tevuremobowowolubokowu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=fire+force+ep+12+eng+subPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000143b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BC1 23148 bytes
SHA-256: d31fb3bf5ea408d118ad575d10eefcc7fa8210e1855124f178d71a1f1602f84e
font_02_sfnt_off0001a0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A0D3 17496 bytes
SHA-256: 9054517b91310ab140ff66d2a762c177a1095ae3f098f0e1bec768fe159d1ea3
font_03_sfnt_off0001ce1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CE1E 10736 bytes
SHA-256: b9659518e3c56501b6200da0694a6a04a32fd3f53756515e2dc9cae24c609193

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